Consolidated Statements of Changes in Equity - SPPC - USD ($) $ in Millions	Total	SPPC	SPPC Common Stock	SPPC Additional Paid-in Capital	SPPC Retained Earnings	SPPC Accumulated Other Comprehensive Income (Loss)
Balance (shares) at Dec. 31, 2019			1,000
Balance at Dec. 31, 2019		$ 1,320	$ 0	$ 1,111	$ 210	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to parent	$ 6,943	111			111
Dividends declared		(20)			(20)
Balance (shares) at Dec. 31, 2020			1,000
Balance at Dec. 31, 2020		1,411	$ 0	1,111	301	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to parent	$ 5,790	$ 124			124
Balance (shares) at Dec. 31, 2021	76,000,000	1,000	1,000
Balance at Dec. 31, 2021	$ 46,694	$ 1,535	$ 0	1,111	425	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to parent	$ 2,721	118			118
Dividends declared		(70)			(70)
Contributions		$ 465		465
Balance (shares) at Dec. 31, 2022	76,000,000	1,000	1,000
Balance at Dec. 31, 2022	$ 46,832	$ 2,048	$ 0	$ 1,576	$ 473	$ (1)